You can investigate bursaries from the university (normally only available in cases of real hardship) I'm assuming you are a regular student, not a lone parent etc. Some companies will sponsor students, but this type of agreement is becoming rare. You should make sure you get the reduction in council tax if you are living off campus.

Then you can take part-time jobs This can be an important source of income, and depending on the job provide work experience. Finally you can apply to your bank for an approved overdraft, but you would be charged interest on such a loan.